All engines covered by this guide are equipped with a radiator mounted electric cooling fan.
REMOVAL & INSTALLATION
See Figures 1 through 4
- Disconnect the negative battery cable.
- Disengage the wiring harness connector from the electric cooling fan.
- If necessary for added clearance or access to the fan mounting bolts, remove the coolant overflow reservoir.
- Remove the cooling fan mounting fasteners, then lift the fan up and out of the engine compartment.
If necessary, the fan and motor can be separated to replace either component, as follows:
- Remove the retaining clip from the end of the motor shaft and remove the fan.
A metal burr may be present on the motor after the retaining clip is removed. Deburring of the shaft may be required to remove the fan.
- Remove the nuts attaching the fan motor to the mounting bracket.
If separated for replacement, assemble the fan and motor, as follows:
- Position the motor on the shroud bracket and install the retaining nuts. Tighten the nuts to 49-62 inch lbs. (5.5-7.0 Nm).
- Install the fan on the motor shaft using the retaining clip.
- Install the cooling fan in its original position, against the radiator.
- Install the mounting fasteners, and tighten them to 71-92 inch lbs. (8-10.5 Nm).
- If applicable, install the coolant overflow reservoir.
- Fasten the motor wiring connector to the harness. Make sure the lock finger on the connector snaps firmly into place.
- Connect the negative battery cable.
- Run the engine and check for proper fan operation.
See Figures 5, 6 and 7
The single speed electric cooling fan is attached to the fan shroud behind the radiator. The system is wired to operate only with the ignition switch in the RUN position. The cooling fan is controlled by a solid state Constant Control Relay Module (CCRM) and the engine control computer.
The CCRM will energize the fan with power from the fuse link when it, and the engine control module receive input from the temperature switch, indicating that the engine coolant temperature has reached at least 221°F (105°C). The fan is designed to stop once the temperature drops below 200°F (90°C). The CCRM and engine control module will also activate the cooling fan if the A/C is on and the vehicle speed does not provide a sufficient airflow (they energize the fan below 43 mph (69 km/h) and stop the fan at or above 48 mph (77 km/h).
A quick check of the fan itself can be made by circumventing the control circuit and providing battery voltage directly to the motor. If the fan works with the control circuit bypassed, the control circuit is at fault. If the fan still does not work, then the motor should be checked for binding or damage, and repaired or replaced.
Test the cooling fan as follows:
- Disengage the electrical connector at the cooling fan motor.
- Connect a jumper wire between the negative motor lead and a good ground.
- Connect another jumper wire between the positive motor lead and the positive terminal of the battery.
- If the cooling fan motor does not operate, it should be replaced. If the motor works, the control circuit is the problem and must be repaired.